Nunan will focus on complex contentious financial regulatory investigations and disputes.

Prior to joining Morgan Stanley, Nunan was head of department, wholesale enforcement for the UK Financial Conduct Authority (FCA) (previously the Financial Services Authority). 

Earlier in his career, he served as a case controller at the Serious Fraud Office (SFO) and as a prosecution lawyer for the Department of Trade and Industry.

Ken Doran, chairman and managing partner of Gibson Dunn, said: “Matt is highly regarded within London’s financial sector and will be a strong addition to the firm. He will add a contentious regulatory capability to our London disputes practice by offering a unique blend of insights to the financial regulatory challenges faced by our clients, gained from having been on both sides of the table – as a financial regulator and an in-house lawyer at a regulated financial institution.”

Jeff Trinklein, co-partner-in-charge of the London office, added: “Matt’s ability to understand both the regulatory and commercial positions inherent in complex investigations and disputes will fit nicely in our premier global enforcement and regulatory practice.  His background complements that of our recent partner additions, Susy Bullock, formerly head of EMEA litigation at UBS and Michelle Kirschner, a financial services regulatory partner who joined us last year.”

Nunan commented:  “I look forward to contributing to Gibson Dunn’s exceptional global financial services regulatory platform as I begin the next chapter of my career.  I’m also looking forward to working with an unrivaled group of talent here in London and globally.”